construction

Free online concrete calculator. Calculate cubic yards, cubic meters, and number of 60lb/80lb bags needed for slabs, footings, and columns.

Free online brick calculator. Calculate the number of bricks and mortar needed for any wall.

Free online paint calculator. Calculate gallons of paint needed for any room. Accounts for doors, windows, coats, ceiling, and custom coverage rates.

Free online roofing calculator. Calculate squares of roofing, shingle bundles, and underlayment rolls. Supports multiple roof pitches and shingle types.

Free online lumber calculator. Calculate board feet, linear feet, and estimated cost for any lumber dimensions. Supports inches and centimeters.

Free online flooring calculator. Calculate square footage, boxes needed, and cost for hardwood, laminate, vinyl, and tile flooring with waste factor.

Free online drywall calculator. Calculate drywall sheets, screws, joint compound, and tape needed for any room. Supports 4x8, 4x10, and 4x12 sheets.

Free online stair calculator. Calculate number of steps, rise per step, run per step, total run, stringer length, and stair angle with building code.

Free online excavation calculator. Calculate dig volume in cubic yards, loose volume with swell factor, truck loads, and weight for trenches.

Free online rebar calculator. Calculate linear feet of rebar, number of standard bars, and weight for concrete slabs. Supports #3 through #8 rebar sizes.

Rebar Equivalent Calculator — Compare reinforcement steel bar configurations. Input your original bar size and quantity to find equivalent bar configura...

Concrete Blocks Calculator — Estimate concrete blocks (cinder blocks) and mortar materials needed for your wall. Provide the wall dimensions and block s...

Plaster Sand & Cement Calculator — Calculate the quantities of cement and sand required for plastering works. Input the total plaster area, thickness, m...

Optimize linear cuts: bars, pipes, beams, timber. FFD algorithm minimizes waste with visual layout. Supports blade kerf, bulk quantities. Free, private.

Optimize 2D sheet cuts: plywood, MDF, drywall, panels. Shelf algorithm with 90-degree rotation. Visual layout with kerf. Free & private in your browser.

Optimize steel bar and rebar cutting for construction. 12m default stock, FFD algorithm minimizes scrap. Visual layout, kerf support, bulk quantities.

Calculate tiles needed for floor or wall. Enter tile size, grout gap, area to get count, boxes, cost & visual grid layout. Free, private, no sign-up.

Calculate grout for tiling. Enter tile size, gap & area to get volume in kg/liters. Sanded, unsanded & epoxy grout supported. Free private tool.

Calculate paintable wall area for rooms. Subtract doors, windows & custom openings. Per-room breakdown with layout view. Free private tool.

Calculate steel rebar weight instantly using the d²/162 formula. Supports all bar diameters (6-40mm). Common bar sizes reference table included.